[RISCV] Move iterators from sync.md to iterators.md

Like the previous two patches this moves the iterators
that are in sync.md to iterators.md.

OK? build and tested for riscv64-linux-gnu.

gcc/ChangeLog:

	* config/riscv/sync.md (any_atomic, atomic_optab): Move to ...
	* config/riscv/iterators.md: Here.

gcc/config/riscv/iterators.md

@@ -150,6 +150,9 @@
 (define_code_iterator any_lt [lt ltu])
 (define_code_iterator any_le [le leu])
 
+; atomics code iterator
+(define_code_iterator any_atomic [plus ior xor and])
+
 ; bitmanip code iterators
 (define_code_iterator bitmanip_bitwise [and ior])
 
@@ -204,6 +207,10 @@
 			(plus "add")
 			(minus "sub")])
 
+; atomics code attribute
+(define_code_attr atomic_optab
+  [(plus "add") (ior "or") (xor "xor") (and "and")])
+
 ; bitmanip code attributes
 (define_code_attr bitmanip_optab [(smin "smin")
 				  (smax "smax")

gcc/config/riscv/sync.md

@@ -27,10 +27,6 @@
   UNSPEC_MEMORY_BARRIER
 ])
 
-(define_code_iterator any_atomic [plus ior xor and])
-(define_code_attr atomic_optab
-  [(plus "add") (ior "or") (xor "xor") (and "and")])
-
 ;; Memory barriers.
 
 (define_expand "mem_thread_fence"